:root {
  --bg: #f5f3eb;
  --paper: #fffdf8;
  --ink: #2b2420;
  --ink-soft: #6b6157;
  --line: #e3ddd0;
  --brand: #a04044;
  --brand-soft: #f1dcdb;
  --ok: #4c6b53;
  --warn: #8a6a2f;
  --weak: #7a6f66;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.wrap { max-width: 760px; margin: 0 auto; padding: 56px 20px 100px; }

.eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--brand);
  text-transform: uppercase;
  margin-bottom: 14px;
}

h1 { font-size: 34px; font-weight: 900; margin: 0 0 4px; letter-spacing: -.01em; }
.subtitle { font-size: 17px; color: var(--ink-soft); margin: 0 0 14px; }
.lede { color: var(--ink-soft); font-size: 16px; max-width: 60ch; margin: 0 0 28px; }

.stats {
  display: flex;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  background: var(--paper);
}
.stat { flex: 1; padding: 14px 12px; text-align: center; border-right: 1px solid var(--line); }
.stat:last-child { border-right: none; }
.stat b { display: block; font-family: 'IBM Plex Mono', monospace; font-size: 20px; color: var(--brand); }
.stat span { font-size: 12px; color: var(--ink-soft); }

.progress { margin: 18px 0 40px; }
.progressbar { height: 6px; background: var(--line); border-radius: 99px; overflow: hidden; }
.progressbar i { display: block; height: 100%; background: var(--brand); width: 0%; transition: width .3s; }
.progress-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--ink-soft);
  margin-top: 8px;
}

.unit {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 26px 26px 22px;
  margin-bottom: 22px;
  transition: opacity .2s;
}
.unit.done { opacity: .72; }

.unit-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; }
.unit-num { font-family: 'IBM Plex Mono', monospace; font-size: 12px; color: var(--brand); letter-spacing: .08em; }
.unit h2 { font-size: 20px; margin: 4px 0 14px; }

.check {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 13px;
  color: var(--ink-soft);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
.check input { width: 16px; height: 16px; accent-color: var(--brand); cursor: pointer; }

.block-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin: 18px 0 6px;
}
.block-label svg { width: 13px; height: 13px; }

.pain {
  background: var(--brand-soft);
  border-left: 3px solid var(--brand);
  padding: 12px 14px;
  border-radius: 0 8px 8px 0;
  font-size: 14.5px;
}
.practice { font-size: 14.5px; }

.evidence { margin-top: 14px; font-size: 12.5px; color: var(--ink-soft); }
.grade {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  border-radius: 99px;
  padding: 3px 10px;
  border: 1px solid;
  margin-right: 8px;
  vertical-align: middle;
}
.grade svg { width: 12px; height: 12px; }
.grade[data-level="強"] { background: #eef1ec; color: var(--ok); border-color: #d3ddd6; }
.grade[data-level="中"] { background: #f5efe2; color: var(--warn); border-color: #e4d8bf; }
.grade[data-level="弱"] { background: #f0eeea; color: var(--weak); border-color: #ded9d2; }
.evidence-note { margin-top: 6px; }
.evidence-sources { margin-top: 5px; }
.evidence-sources a { color: var(--brand); }

.videos { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px; }
@media (max-width: 560px) { .videos { grid-template-columns: 1fr; } }

.video { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: #fff; }
.video-frame {
  position: relative;
  aspect-ratio: 16/9;
  background: #000;
  cursor: pointer;
  border: 0;
  padding: 0;
  width: 100%;
  display: block;
}
.video-frame img { width: 100%; height: 100%; object-fit: cover; display: block; opacity: .85; }
.video-frame .play { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; }
.video-frame .play span {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: rgba(160,64,68,.92);
  display: flex;
  align-items: center;
  justify-content: center;
}
.video-frame .play span::before {
  content: '';
  border-style: solid;
  border-width: 7px 0 7px 12px;
  border-color: transparent transparent transparent #fff;
  margin-left: 3px;
}
.video-frame iframe { width: 100%; height: 100%; border: 0; display: block; }

.video-meta { padding: 10px 12px; }
.video-meta .vt { font-size: 13px; font-weight: 700; line-height: 1.4; }
.video-meta .vc { font-size: 11.5px; color: var(--ink-soft); margin: 2px 0 6px; }
.video-meta .vw { font-size: 12px; color: var(--ink-soft); }
.video-meta .vlink { font-size: 11.5px; margin-top: 6px; }
.video-meta .vlink a { color: var(--ink-soft); }

.tags { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: 99px;
  padding: 2px 9px;
}

footer { margin-top: 48px; padding-top: 22px; border-top: 1px solid var(--line); font-size: 12.5px; color: var(--ink-soft); }
footer p { margin: 0 0 8px; }

.loading, .error { padding: 40px 0; color: var(--ink-soft); font-size: 14px; }
.error { color: var(--brand); }